THE PROPAGATION OF THE BUISMAN ELM
Members of the Propagators Society and visitors: I don't have a lot of scientific information to give you this afternoon in regard to percentages and data of that kind. What I can give here this afternoon is merely our own personal experience in the propagation of this tree.
As you know, the Buisman elm, and I am referring to the same thing sometimes called the Boisman elm, was introduced from Europe, I think in the early twenties. It was used there as a tree resistant to the Dutch elm and they later discovered it is also resistant to phloem necrosis.
The only way that we can propagate this tree and maintain the resistant qualities is, of course, vegetatively. There are several ways that have been tried with more or less success, such as budding, grafting, top cuttings, hardwood cuttings, and root cuttings. Our own experience has been confined principally to that of root cuttings and softwood cuttings in the greenhouse.
We have been very unsuccessful in taking the wood cuttings from
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